@Jamalh14 Hi, Is DHCP enabled on PC when connect to LAN? What is the IP address on your computer get? How to find IP address on your devices Did you test with other wired devices if they can work?...

@henr0182 Hi, Please try if this driver can help: WindowsDriver_1030.44.0408.2024. And you can also try other suggestions here: What should I do if the TP-Link network adapter is not working properly...

@D4_mi Hi, The speed you can get from the powerline devices will be affected by the interferes in the powerline environment. To confirm if the speed you get is slow or not, you can refer to this link...

@David_Eis Hi, Please try this link: Deco M4/S4_V2 Support Connection Preference

@Tabs89 Hi, Yes, you can let it work with a German SIM. But please ensure that the Network type of the SIM card is consistent with the Network type supported by the router. You can check this...

@seast Hi, May I know why you want to set it up that way? You dont want internet access and only want the devices communicate with each other within LAN? You can try to set an unavailable IP address...